wellman



7 F. E. WELLMAN APPARATUS FOR REFINING MINERAL OILS. APPLICATION FILEDJAN. 21, 1918.-

PRESSURE VA LI/E COOLING COIL'FOI? 7 Patented Apr. 1920.

mamas;

' To all whom it may concern;

FRANK E. WELLMAN, or KANSAS CITY, KANSAS, ASSIGNOR TO THE KANSAS CITYGASOLINE coMrANY, or ANSAS CITY; KANSAS, A CORPORATION'OF KANsAs.

APrARA'rUs FOR REFINING iflINERAL OILS.

. I Application filed January 21, 1918. Serial No'. 212,950.

Be it known that I, FRANK E. WELLMAN,

a citizen of the United States, residingv at Kansas City, in the countyof WVyandotte and State of Kansas, have invented certain new and usefulImprovements in Apparatus for Refining Mineral Oils, of" which thefollowing is a specification, reference being had therein to theaccompanying drawing.

My invention relates to oil refining apa into the superheater coil,after a break paratus and especially to apparatus for treat.-

v a; structure an "embodying the preferred form of my inveniionv,"

- ing mineral oils under high temperature and.-

high pressureand controlling means therefor. v

The present invention is a continuation in part of my copendingapplication Serial No.

I --'110,794, filed July 22, 1916, in which I have g described acombination of apparatus for use incracking mineral oils under hightemperature; and high pressure with certain fsafety appliances found tobe necessary in the useio'fsai d apparatus, especially where.

,high' pemmre to beemployed,

'My;{invention is illustrated in the a'ccompan'ying drawing which vshows in diagram arrangement of apparatus and high pressures are Referrrig a .suctionpipe 13 to the pump '14. From the pump a discharge pipe 15is carried'to "ithesuperheaterlfi, in which discharge pipe are connectedan automatic check valve 17,

1 a normal relief valve 18,.and an automatic [is expanded at the intakehead 16 to a cut-ofi' valve 10. The coil of the sup'erheater diametergreater than the pipe line 15. From the outlet head. 16 an extens onpipe 19,.ofthe same diameter as the superheater to accommodateanumlferlof ceils' of smaller pipe 21, forexample 1 inchpipe, from-therelief valve 18. This v oranequivalent pro- "vision'for cooling the" a vsolutely necessaryfiiii-pract fce. 'inj'order to;

to' the drawing in particular, 12 indicates a receiving tank into whichdischarges a feed pipe 11leading from a 'suitable source of supply ofthe-hydrocarbon to be cracked. From the feed tank 12'extends inengagement with'the valve lever.

prevent the destructive efiect of oil sud denly discharged into theatmosphere at hightemperature and high pressure. The

valve 18 is a three-way valvearranged to close the connection with thepipe l5 'and connect the coil 16 with the relief pipe 21 in" emergency,but normally closing the 1' e-,

lief passage and connecting the pipe 15 with the sup'erheater coil." Thepurpose of this is to prevent additional vapor being forced ours in the'latter, which would otherwise y to any fire already started.

v As the use of the. relief valve 18 is usually necessaryat a time whenthere is some daner to-the operator, it is desirable to have itcontrolled from a distance and to be certain in operation. To tlllSBIld,insteadof the usual hand wheel, the valve stem is turned by a lever 30fixed thereto provided-with a counterweight 31 tending-to swing thelever to open'the .valve,-and a latch 32 'for. holdi 4 ing the lever inits normal position against the tension of;- the weight. This latch ispivoted at 33 and is'arranged to be operated from a distance by means oithe pull cord" 34: attached thereto at a point above the pivot so as topull the latch outof engagev nient with the arm. A suitable retractileSpring 35 is provided for holding the latch Similarly the high pressurecontrolling valve 25 is in practice provided with a drum 36 fixed to thevalve stem in place ofthe usual hand wheel, and on this drum is'coiled a'cord or cable 37 'which leads to a distant point so that .the valve maybe opened and closed without approachin the superheater, the drum beingprovide with a retracting cord 38 woundon the hub 39 and Itensioned by aweight 40, so that the drum 36 may be rotated 4 in opposite directionsby pulling and releasing theoperating cord 3}. For further safetyIinsert'a check valve 22 in thepipe 1-9 leading into the precooler 20.This check valve acts in case of an emergency to prevent oil or vaporfrom such segregating and receivlng apparatus as may be connected withthe pipe 23 from flowing back into 'lated by the'highfpre'ssurecontrolling valve :25; The valve 10. insertdin the pipe line 1? is anautomatic valve operable 'upon a decrease in pressure 1n the superheatercoil l6-to close communication between said coil.

and the tank 12' until the; pump can be shut down. This valve Inay'befof any known type of regulating valve responsive to changes in pressureand may, as shown, con-J .trolled as and for the purposes above desistgenerally of a globe valve 41; having its valve stem 42 operated by} adiaphragm 43 connected with the diaphragm chamber-4:4, 7

- which chamber may be connected through a suitable pressure line 45 tothe pipe line 15,

as shown, or'any part of the apparatus in which the pressure is the sameasthat in the superheater.

In operation, the receiving. being supplied from a suitable source withhydro-f-fl carbon to be cracked, the'fp ump lt is,start'- ed, and thesuperheaterco'il 16' is partially filled with the material and heatisstarted in the furnace of the superheate'r. With the high pressurecontrolling'valve closed,

the temperature of the superheater is raised and at the 'sametime thepump 14: is kept Working to increase the pressure, until. sufiicientcracking commences." The valve 25 isi then manipulated so as to start anoverflow of the cracked product through the pipe 23 to suitablesegregating and receiving apparatus not shown, which operation isthereafter carried on continuously, the temperature being maintained atabout 700 F. or over and the pressure at approximately 200 pounds, thevalves 18 and 25 being conscribed. v I

v Having thus described-my invention what 'I- 'claimand desire to secureby Letters Patv n 5 $1.; In a system for cracking hydrocarbon oil,

a cracking coil of large diameter, feed and "discharge pipes ofsmallerdiameter, a pressure valve at the-discharge end of said cracking-coil,and a safety discharge valve at the intake end of the cracking coil,said valves' both having cooling coils, that on the pressure valve beingof the same diameter as the cracking coil, and that on the safetydischarge being'the same diameter as the intake pipe.

In testimony whereof I aflix my signature.

' FRANK E. WELLMAN.

